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Hints, Tips and Solutions (Do NOT post requests for help here) If you have any useful general hints and tips for vintage technology repair and restoration, please share them here. PLEASE DO NOT POST REQUESTS FOR HELP HERE!

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Old 11th Sep 2019, 12:21 am   #1
Oldcodger
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Default Cleaning PCB

Excess flux on a board. Scrub it, but where to find a brush . Take one artists brush ,wrap with tape and it's job jobbed. I used a 15x6 mm, which tapes up to a firm 6mm brush.
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Old 11th Sep 2019, 1:14 pm   #2
kalee20
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Default Re: Cleaning PCB

I use a toothbrush, or a cut-off paintbrush, depending which way I need to scrub!
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Old 11th Sep 2019, 1:51 pm   #3
Goldie99
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Default Re: Cleaning PCB

It's even easier if you use an electric toothbrush....
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Old 12th Sep 2019, 8:45 pm   #4
McMurdo
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Default Re: Cleaning PCB

I've always used an old bristle paint brush that's been given a 'haircut'. I did try a toothbrush but got tired of scraping my knuckles across cut-off component legs. The advantage of a paintbrush is that a stronger solvent like MEK or Xylene doesn't dissolve it.
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Old 12th Sep 2019, 9:40 pm   #5
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Default Re: Cleaning PCB

My local art shop sells nice stubby paint brushes at 5 for a quid. I trim them too. Perfect for the job.

Agree on the knuckles issue with the toothbrush. I rather like not having road rash from cleaning a board!
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Old 12th Sep 2019, 11:02 pm   #6
Oldcodger
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Default Re: Cleaning PCB

Mr B- must try that, but toothbrush- static problems? I've none in my circuit- it's a 7805 into an AMD 0512, but on CMOS, I'd be wary, with an electric toothbrush.
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Old 22nd Sep 2019, 4:35 pm   #7
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Default Re: Cleaning PCB

I tend to run a craft knife (the blunt side) along Veroboard to clear the space between tracks then brush with an old toothbrush. If I am really trying to clear things to spotless I use a cotton bud soaked in isopropyl alcohol then brush with the toothbrush.

I do use a paintbrush for dust around components, sometimes using it with isopropyl dependant upon risk to components.
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Old 9th Oct 2019, 9:09 pm   #8
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Default Re: Cleaning PCB

I use an old toothbrush + IPA, gives great results for removing /dissolving messy flux..
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